egypt has recalled the ambassador to israel following the killing of a top hamas leader. the palestinian authority isialing the u.n. to condemn what it calls illegal criminal actions. israel says it's just defending itself and will do it again if necessary. leland vittert reports from jerusalem. >> from an israeli drone you can see the car of hamas' military commander driving along a quiet street in gaza city. the missile appeared to come out of nowhere. he didn't have a chance. his car burped to a shell. within hours the israeli air strike killed two more senior hamas militants and destroyed major weapon store ran facility. the assassination marked the start of operation pillar of cloud against hamas and islamic jihad in response to a week of militant rockets launched in southern israel. and the missile attack of an army jeep as shown in this video provided by the attacke attackers. at a press conference israel's prime minister promised "anything needed to defend our citizens." he continued we are ready to bring in more forces if needed. alluding to a ground defense that